# Apply business rules Control / script A variant of [Run a script](https://meridian.online/operations/run-a-script). Evaluate a rule set from a rules engine against each row or the collected rows and act on the result. Page: ## Status Not built yet. arcform does not do this yet; it would live in how a Protocol runs. [Its place on the roadmap](https://meridian.online/roadmap#run-a-script) ## What other tools call it Meridian's classification; an independent blind rating agreed on 95.7% of 324 rows (variant, version 3). - Apache Hop: [`Drools Rule Accumulator`](https://hop.apache.org/manual/latest/pipeline/transforms/rulesaccumulator.html) (read 2026-09-27) - Apache Hop: [`Drools Rule Executor`](https://hop.apache.org/manual/latest/pipeline/transforms/rulesexecutor.html) (read 2026-09-27) - Pentaho Data Integration: [`Rule Accumulator`](https://docs.pentaho.com/pdia-data-integration/9.3-data-integration/pdi-transformation-steps-reference-overview) (read 2026-09-27) - Pentaho Data Integration: [`Rule Executor`](https://docs.pentaho.com/pdia-data-integration/9.3-data-integration/pdi-transformation-steps-reference-overview) (read 2026-09-27) - Talend: [`tBRMS`](https://help.qlik.com/talend/en-US/components/8.0/business-rules/business-rules-component) (read 2026-09-27) - Talend: [`tRules`](https://help.qlik.com/talend/en-US/components/8.0/business-rules/business-rules-component) (read 2026-09-27)